Bump com.github.openstack4j.core:openstack4j-core from 3.11 to 3.12

Bumps [com.github.openstack4j.core:openstack4j-core](https://github.com/openstack4j/openstack4j) from 3.11 to 3.12.
- [Release notes](https://github.com/openstack4j/openstack4j/releases)
- [Changelog](https://github.com/openstack4j/openstack4j/blob/main/CHANGELOG.md)
- [Commits](openstack4j/openstack4j@openstack4j-parent-3.11...openstack4j-parent-3.12)

---
updated-dependencies:
- dependency-name: com.github.openstack4j.core:openstack4j-core
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

build.gradle

@@ -58,7 +58,7 @@ ext {
     deps = [
         gocdPluginApi: 'cd.go.plugin:go-plugin-api:23.5.0',
         mockito      : 'org.mockito:mockito-core:5.11.0',
-        openstack4j  : 'com.github.openstack4j.core:openstack4j-core:3.11',
+        openstack4j  : 'com.github.openstack4j.core:openstack4j-core:3.12',
         cache2k      : 'org.cache2k:cache2k-api:2.6.1.Final',
     ]